Heptabase is a visual knowledge base for people who want to understand and create knowledge, not only collect it; its company wiki states that Heptabase was founded in September 2021. Users break sources into cards on whiteboards, by hand or with AI, then give that material structure with nested tags and properties. Apps are offered for Mac, Windows, Linux, iOS and Android.
The homepage leads with the line "AI gives you answers. Heptabase builds your worldview." Supported sources include PDFs, web pages, YouTube videos, podcasts, Readwise and Zotero, and readers can go deeper through every citation on a card. An AI Tutor turns a learning goal into a personalized course, and a plugin lets users work with their Heptabase knowledge from 📝Claude Code, 📝ChatGPT, 📝Codex or 📝Grok Bot. As of November 2026, the pricing page lists three plans, Pro, Premium and Premium+, with monthly or yearly billing; yearly billing is marked as saving 25 percent. Documentation lives on the Heptabase Public Wiki.